Remember that the number of protons in the nucleus determines an element's identity. Chemical changes do not affect the nucleus, so chemical changes cannot change one type of atom into another. The number of protons in a nucleus does change sometimes, however. The identity of the atom, therefore, changes.
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maybe 1 or 3 im not sure
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i didn't study it yet sorry for not helping but try asking someone else
Answer:que es la oms y porque a esta organizacion le preocupan temas como el expuesto
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to collect measurable, empirical evidence in an experiment related to a hypothesis the results aiming to support or contradict a theory.
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